Furnace-door mechanism



P.CAP-0ZZA. FURNACE DOOR MECHANISM.

APPLICATION FILED DEC.23| I920-,

Patnted Mar. 28, 1922 2 SHEETS-SHEET I.

PIC-3.1.1

P. CAPOZZA.

FURNACE DOOR MECHANISM. APPLICATION FILED 050.23. 1920.

Patented Mar. 28, 1922.

2 SHEETS-SHEET 2- Fla 4.

u ll

. rznrao cArozzA, or ronrmnn, interns.

FURNAE-DOOR MECHANISM.

To all whom it may concern:

Be it'known that 1, Pm'rno CAPOZZA, a citizen of the'United States of America,residing at Portland, in the county ofCumberland and State of Maine, have invented certain new and useful Improvements in Furnace-Door Mechanisms, of which the fol: lowing is a specification. r

This invention relates to certain new and useful improvements in furnace dooropening and closing mechanisms whichmaybe conveniently associated with time controlling mechanism in any usual or well known manner if desired for controlling the draft of a furnace or for opening the doors for preventing the introduction of fuel.

The primary object or" the present invention is to provide a device of this kind which will enable relativelylarge and heavy doors of furnaces to be operated efficiently and expeditiously without arduous manual labor or exposure of the operator to the heat at the door opening. r

Briefly described, the present invention embodies a door closure with manually operable means to open and close the same,.and

power operated means for operating the same automatically releasable. upon closing of the doors for permitting operation of the manual operatingmeans if desired.

With the above; general objects. in view and other that will become apparent as the nature of theinvention is better understood, the same consists-in the novel form, combination and. arrangementof parts hereinafter more fully described in connection with the accompanying drawings ,and in which like reference characters designate correspondingparts throughout the several views. r

In the drawings, 4 g l Figure l is avertical sectional view show ing a fragment of a furnace equipped with a door opening andclosing mechanism constructed inaccordanoe with the present in vention and taken substantially upon line I--I of Figure 4 with the power operated mechanism released and the doors closed just prior to the final movement or" the power piston to its full released position, Figure 2 is a similar view with the doors in partly open position, s

.Figure 3 is a further similar view with the power operated mechanism completely released,

Specification of Letters Patent. Patented f 28 1922 Appiicationfiled December 23, 1920. Serial bio-432,814. y

plan View of the device partially closed by each of the door sections 8 and to be completely closed by both of the same, said doorsections being preferably in the form of plates slidable in said guides across the opening 6.

A suitable frame is the opening 6 composed of a platef) lying fiat against the outer surface of the furnace wall and a similar plate 10 rigidly maintained in front of and. in spaced relationto the plate 9 by bolts 11 or the like. A pair of spaced rods 12 are supported by the plates 9 andlO, and these rods serve as hangers for pivotally supporting a pair of levers 13 through the hubportions of which the rods 12ireely extend. The levers 13 are, pivotally connected at their lower ends rigidly fastened above to the door sections 8 by means of pins 14:

rigid with the door sections 8 and projecting through longitudinal elongated slots 15 provided in the lower ends of the levers 13. The levers 13 are provided with lateral projections which extend toward each other and which are in the form of segment gears 16 meshing with each other as shown clearly in Figure 1, whereby swinging movement of either one of the levers 13 will cause a corresponding swinging movement of the other. .p 4 i y ()ne of the levers '13 is provided with an additional segment gear above its pivot as at l7 and it meshes with a spur gear 18 which is carried by ashaft 19 rotatably mounted in'the plates 9-and 10 above the adjacent rod 12, the spur gear 18 being in turn meshed with a-pinion 20. The pinion 20 is carriedby a rotatable shaft 21 also supported by plates 9 and 10 above the levers 13, and this shaft ,2]. is provided with a hand crank or handle 22 upon its outer end for rotating the same whereby the levers 13 may be manually operated for opening and closing the sliding sections or doors 8.

The other lever 13 is provided with an.

rigidly fastened to the furnace above the" upper guide 5 and at one side of the lever 13 which carriesthe arm 23, and a suitable motive agent such as steam or air'is to headmitted in eitherendof this-cylinder through pipes which connectw'ith a control valve 26 The valve 26'also connects witha pipe 27 leading to a suitable source' of motive agent supply, and it may be operated in a well known manner either manually or automatically for admitting the, motive agent into the desired end of the'cylinder 2a. A piston 28 indicated by dotted lines in Figure 1 is reciprocable in the cylinder 24: andis provided with a piston rod 29'projecting through the end of thecylinder adjacent the arm 23 with its outer free end arranged to engage said arm so that when the piston isforced in one dire'ctionthe rod 29 will causeswinging movement of the ad'- jacent arm 13 and through the gearingde seribedcause'opening of the sliding doors 8. A pivoted latch or catch 30 is carried by the piston rod 29 and is provided at its outer end with an eye-portion formed toreceive the arm 23' so asto enable the piston and its rod toswing the levers-13 for 0108- ing the doors-when the piston is forced inwardly of the cylinder 24 or in the opposite direction. A suitable spring 31 is preferably disposed between the piston rod 29 andthe catch 30 to insure movement of said catch to engage the arm 23' and a suitable actuating member 32 isrigidly carried adjacent the cylinder 2% in an inclined position to:automatically swing the latch-30 for releasingit from the arm 23 after the doors have been" closed by the power operated mechanism, the release; ofthe latchbeing effectedjust prior to: the final, movement of thepist'on 28-inwardly of the cylinder 24 as shown in Figure 1. The piston and parts 7 movable-therewith then move further to the position of Figure 3 and by reason of the release of latch 30, the parts are disposed for permitting manual opening or closing of the doors by operation of the crank 22 if found desirable. By comparing in the order named, Figures 3, l, and 2, it will be seen that'as the piston is forced toward the levers 13,the catch 30 ridesffrom under the.

operating lug 32 and is released at the'proper time so asto be" forced by the spring 31' over the end of thearm 23.

It is believed that the construction and operation of the present invention will bereadily understood and appreciated by those skilled in the art from the foregoing descriptionr Minor changes may be made without departing 'ifrom" the spirit and scope of the invention as hereinafter claimed.

What is claimed as new is:

1. In combination with a pair of sliding door sections and operating levers'therefor, means fonmanually operating one of said levers to open and close said doors, power operated means for operating the other of said levers for opening and closing said doors, said levers being intergeared, and automatic means-for releasinglthe power oprated mechanism from the lever upon clos ingof the doors by said poweroperated means;

2. In combination with a' pair of sliding door sections and' operating levers therei or, means for manuallyoperating one of said levers toopen and close said doors, power operated means for operating theotherof said levers for opening and closingsaid means for manually operating; one of said levers to open and close 'said doors, power operated means for operating" the other of said levers for opening and closing said doors, said levers being intergeared, and

automatic means 1 for releasing the power operatedmechanism from the lever upon closing: the doors by said power operated means, saidlev er's beingj pivotally and slidabl y connected-te said-doors and the operative connection between themanually op: I

er'able' means and its lever including aseg ment gearons'aid levee 1-. In comb nation wan-a pair of 'sliding door seetions aud operating? levers therefor,

means for: manuallyoperating one? of said levers" to olfieii and close said (10ers, power operated meansfor operating. the other of said levers .for' opening and closing said doors, said levers beingflintergeared, and

automatic mean's'for releasing the powe'roperated mechanism from the lever upon closing of the-doors by said" power operated means,';said levers being pivotally and sliclably connected 'togsaid" doors and the means for automatically releasing the power operated means from its leverincluding an arm on said lever andfa spring pressed catch carried by" the power operated meansi 5. In combination with a pair of sliding door sections and operatinglevers therefor, means for manually operating one of said levers to open and close said doors; power operated means for operating the other of ated means from its lever including an arm on said lever and a spring pressed catch car- 10 ried by the power operated means and an inclined stop arranged to disengage the catch from the arm \vhenthe doors are closed.

In testimony whereof I aflix my signature.

PIETRO CAPOZZA. 

